ISO 15693 - SOF / EOF for St25R3911B

[nicolai geske]

Posted on May 25, 2018 at 09:45

Hello,

I'm developing a System for different NFC types. ISO 14443-A and B works well with ST25R3911B, but I have some trouble getting the ISO 15693 working.

The St25R3911B is set to Sub-carrier Stream-Mode and all settings are done.

I have my dataword (flags, command, mask, makslength, crc16) with LSB and LSb first.

I write this to FIFO. But start transmit with direct Command 'RFID_TRANSMIT_WITHOUT_CRC' / ('RFID_TRANSMIT_WITH_CRC') does not give me any response.

To me it looks like the SOF / EOF ( actually I do not do any SOF / EOF - datasheet tells timing is done in St25R3911B)

is wrong.

Could someone give me a hint ?

Best regards, Nicolai.

[Ulysses HERNIOSUS · Accepted solution]

Posted on May 25, 2018 at 11:07

Hi Nicolai,

ST25R3911B does not support ISO15693 framing/bit coding decoding. All that must be done inside software. Our demo sources (e.g. x-cube-nfc5 contains the so-called RFAL) show how to perform all the necessary codings, etc.

Regards, Ulysses.

[nicolai geske]

Posted on May 25, 2018 at 12:30

Hello Ulysses,

thank you for your reply.

Best regards, Nicolai